Hellermanntyton inside serrated releasable cable tie one hand release black hellermann tyton 115 40300 the hellermanntyton 115 40300 rez300 is a cable tie from the rez series the tie is serrated on the inside and has a unique patented head design that enables quick and simple release the tie can be inserted in the normal way and pulled tight or the tail can be twisted into the open part of the head and locked into place the quick release mechanism can be released by one hand even when